Well that was in s5, I saw that episode, unless it happened again. It's s6/s2 and so far with s7/s3 that I haven't seen. And I know the end of TVD-s5 has had bearing on characters come back into TO, but I watched to that eventually (and thought it was a natural end point for TVD as it even faded to white instead of black).

But it sounds like they much have been pretty separate since then if that's what you're thinking of.